Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '494fd224478972c00393babeeaa17b4e7b0d96bc45d443315b22923a1bf0a99a' 
  AND token = '+z7wpQa4Z3GaJzkGfrDxWrZfC5zeP7YqKrIKqqGkU8s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}